Ultrasound diagnostic apparatus

Abstract

For an ultrasound diagnostic apparatus, a learning model is trained to output an image adjustment parameter suitable for ultrasound data from input ultrasound data. A specific region decision unit specifies a specific region in a data space of the ultrasound data. A specific parameter decision unit inputs specific region data, which is ultrasound data of an inside of the specific region in the ultrasound data that is a processing target, to the trained learning model, and decides a specific parameter based on output of the learning model. An image quality adjustment processing unit executes image quality adjustment processing based on the specific parameter on the ultrasound data of the inside of the specific region, and executes image quality adjustment processing using a predetermined parameter for image quality adjustment different from the specific parameter on the ultrasound data of an outside of the specific region.

What is claimed is: 
     
         1 . An ultrasound diagnostic apparatus comprising:
 a specific region decision unit that decides a specific region corresponding to a portion of an ultrasound tomographic image corresponding to ultrasound data obtained by transmitting and receiving ultrasound waves to and from a subject, in a data space of the ultrasound data;   a specific parameter decision unit that decides a specific parameter, which is an image quality adjustment parameter for the specific region, based on output of a learning model in a case in which the ultrasound data of an inside of the specific region is input to the learning model that has been trained to output an image adjustment parameter suitable for the ultrasound data from the input ultrasound data by using learning data including the ultrasound data obtained by transmitting and receiving the ultrasound waves to and from the subject and a training image adjustment parameter to be used in image quality adjustment processing on the ultrasound data; and   an image quality adjustment processing unit that executes image quality adjustment processing of adjusting an image quality of the inside of the specific region of the ultrasound tomographic image on the ultrasound data of the inside of the specific region based on the specific parameter, and executes image quality adjustment processing of adjusting an image quality of an outside of the specific region of the ultrasound tomographic image on the ultrasound data of the outside of the specific region by using a predetermined parameter for image quality adjustment different from the specific parameter.   
     
     
         2 . The ultrasound diagnostic apparatus according to  claim 1 ,
 wherein the image quality adjustment processing unit uses an image forming model in which the specific parameter is used as a weight parameter, to form the ultrasound tomographic image of the inside of the specific region, which has an adjusted image quality.   
     
     
         3 . The ultrasound diagnostic apparatus according to  claim 1 ,
 wherein the image quality adjustment processing unit executes image quality smoothing processing of smoothly changing an image quality at a boundary between the inside of the specific region and the outside of the specific region.   
     
     
         4 . The ultrasound diagnostic apparatus according to  claim 1 , further comprising:
 a display controller that causes a display unit to display a first ultrasound tomographic image in which the image quality adjustment processing based on the specific parameter is executed on the inside of the specific region and the image quality adjustment processing based on the predetermined parameter is executed on the outside of the specific region, and a second ultrasound tomographic image in which the image quality adjustment processing based on the predetermined parameter is executed on an entire region.   
     
     
         5 . The ultrasound diagnostic apparatus according to  claim 1 ,
 wherein the specific region decision unit decides the specific region in accordance with an indication from a user of the ultrasound diagnostic apparatus.   
     
     
         6 . The ultrasound diagnostic apparatus according to  claim 1 ,
 wherein the image quality adjustment processing unit executes the image quality adjustment processing of adjusting the image quality of the inside of the specific region of the ultrasound tomographic image in accordance with an image quality adjustment policy corresponding to an indication from a user of the ultrasound diagnostic apparatus.   
     
     
         7 . The ultrasound diagnostic apparatus according to  claim 6 ,
 wherein the specific parameter decision unit stores a combination of user identification information for identifying the user of the ultrasound diagnostic apparatus, a part of the subject included in the specific region decided in accordance with an indication from the user, and the image quality adjustment policy indicated by the user for the specific region, in a memory, and   the image quality adjustment processing unit executes image quality adjustment processing of adjusting the image quality of the inside of the specific region of the ultrasound tomographic image in accordance with the user identification information of the user and the image quality adjustment policy associated with the part in the memory in a case in which the specific region including the part is decided in accordance with the indication from the user.